tolong di jawab pake cara ya!

[4...2] - [x. -4] = [2..-1][2..3]
[y..-3]....[4...3]....[-2.3][-1..0]


[4-x....2-(-4)] = [2×2+(-1)×(-1)..2×3+(-1)×0]
[y-4......-3-3]....[-2×2+3×(-1).....-2×3+3×0]


[4-x....2+4] = [4+1.....6+0]
[y-4.......-6].....[-4-3..-6+0]

[4-x....6] = [5...6]
[y-4...-6]....[-7.-6]

4 - x = 5
x = 4 - 5
x = -1

y - 4 = -7
y = -7 + 4
y = -3

x + 3y
= -1 + 3(-3)
= -1 - 9
= -10 (A)